01 -
Preheat oven to 375°F (190°C). Lightly grease a 9x13-inch baking dish with cooking spray or butter.
02 -
In a large skillet over medium heat, cook ground beef, breaking it up until browned, about 7-10 minutes. Add diced onion, green bell pepper, and minced garlic; sauté for 5 minutes until softened and fragrant.
03 -
In a bowl, combine condensed cream of mushroom soup and sour cream. Stir until smooth. Season with salt and pepper to taste.
04 -
Arrange half of the thinly sliced Russet potatoes in the bottom of the prepared dish, seasoning lightly with salt and pepper. Spread half of the beef and vegetable mixture evenly over the potatoes. Repeat with remaining potato slices and beef mixture, seasoning the potato layer as before.
05 -
Pour the cream sauce evenly over the layered potatoes and beef, spreading gently with a spatula.
06 -
Sprinkle shredded cheddar cheese evenly over the top. Bake in the preheated oven for 30-35 minutes, until potatoes are tender and cheese is golden brown.
07 -
Remove from oven, top with French fried onions, and return to bake for an additional 5 minutes until onions are crispy.
08 -
Allow to cool for a few minutes before serving. Garnish with sliced green onions or chopped fresh parsley if desired.